There are companies that make battery cases for phones but they are usually limited to flagships from brands like Samsung and Apple, leaving out other smartphone brands. Notwithstanding, we have seen a few of these less popular brands get fitted with custom batteries by folks in China. This time around, the OnePlus 5 is the one getting this customization.

The OnePlus 5 has a 3300mAh battery and this is around the standard capacity found in most flagships. And with dash charging, you can be back to talking and browsing in less time than most phones. Now, imagine swapping that battery out for an 8,000mAh one. That’s a huge bump literally and figuratively.

Someone was able to pull it off successfully in China and has provided images. One of the pictures even shows the phone still supports OnePlus’ Dash Charge. According to the owner, battery life increased from one full day to three days on a single charge. Impressive right?